//价格按钮
function add_text() {
	if (parseInt(document.getElementById('amount').innerHTML) < 100) {
		document.getElementById('amount').innerHTML ++;
		document.getElementById('money').innerHTML = parseInt(document.getElementById('money').innerHTML) + parseInt(document.getElementById('price').innerHTML); 
	}
	
}

function minus_text() {
	if (parseInt(document.getElementById('amount').innerHTML) > 1) {
		document.getElementById('amount').innerHTML--;
		document.getElementById('money').innerHTML = parseInt(document.getElementById('money').innerHTML) - parseInt(document.getElementById('price').innerHTML); 
	}
	
}


